Bushkiller, Japanese bindweed, annual fleabane and Carolina horsenettle, these plants are common weeds found along riverbanks in Japan. Some are native to Japan, while others are invasive plants brought from overseas. Each has unique characteristics and poses different levels of threat to the local ecosystem.
Bushkiller, Arakawa River, Kofu-shi, Yamanashi, 6/11/2026
Bushkiller (Causonis japonica): https://en.wikipedia.org/wiki/Causonis_japonica; (In Japanese) https://mikawanoyasou.org/data/yabugarasi.htm
Japanese bindweed, Arakawa River, Kofu-shi, Yamanashi, 6/11/2026
Japanese bindweed (Calystegia pubescens): https://en.wikipedia.org/wiki/Calystegia_pubescens; (In Japanese) https://mikawanoyasou.org/data/hirugao.htm
Annual fleabane, Arakawa River, Kofu-shi, Yamanashi, 6/11/2026
Annual fleabane (Erigeron annuus): https://en.wikipedia.org/wiki/Erigeron_annuus; (In Japanese) https://mikawanoyasou.org/data/himejyoon.htm
Carolina horsenettle, Arakawa River, Kofu-shi, Yamanashi, 6/11/2026
Carolina horsenettle (Solanum carolinense): https://en.wikipedia.org/wiki/Solanum_carolinense; (In Japanese) https://mikawanoyasou.org/data/warunasubi.htm